On Monday, January 15, 2018 at 2:20:15 PM UTC+1, Michele Simionato wrote:
> Dear all,
>
> a new release of the decorator module is out. The new feature is a simple
> facility to define parametric families of decorators (aka decorators with
> arguments).
>
> Here a
Dear all,
a new release of the decorator module is out. The new feature is a simple
facility to define parametric families of decorators (aka decorators with
arguments).
Here are the relevant links:
Download: https://pypi.python.org/pypi/decorator/4.2.0
Project:
pdb plus plus: https://pypi.python.org/pypi/pdbpp
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There is a trick that I use when data transfer is the performance killer. Just
save your big array first (for instance on and .hdf5 file) and send to the
workers the indices to retrieve the portion of the array you are interested in
instead of the actual subarray.
Anyway there are cases where
Il giorno lunedì 17 luglio 2017 19:20:04 UTC+2, Steve D'Aprano ha scritto:
> collections.namedtuple generates a new class using exec, and records the
> source
> code for the class as a _source attribute.
>
> Although it has a leading underscore, it is actually a public attribute. The
> leading
Dear all,
a new release of the decorator module is out. For the first time we support
decorating Python 3.5 coroutines. For instance, this is an example of how to
implement a tracing decorator called log_start_stop that you can use for
debugging:
import time
import logging
from asyncio import
am not aware of any issues, but one is
never sure with new features.
Thanks for your help,
Michele Simionato
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Thanks. I suspected the culprit was executescript, but I did not see it
documented in https://docs.python.org/3/library/sqlite3.html#connection-objects.
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porting some
code from PostgreSQL to sqlite3, with Postgres doing the right thing and sqlite
failing.
I am puzzled,
Michele Simionato
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I did not know about docopt. It is basically the same idea of this recipe I
wrote about 12 years ago:
https://code.activestate.com/recipes/278844-parsing-the-command-line/?in=user-1122360
Good that it was reinvented :-)
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://github.com/micheles/plac/blob/0.9.3/doc/plac.pdf
Michele Simionato
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Support the Python Software Foundation:
http://www.python.org/psf/donations/
I have released a new version of the decorator module with an improved
documentation, thanks also to the nice CSS submitted by
Tony Goodchild. If you are a long time user of the module, see what's new at
http://pythonhosted.org/decorator/documentation.html
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On Sunday, May 29, 2016 at 4:42:17 PM UTC+2, Ankush Thakur wrote:
> Hello,
>
> I'm a self-taught programmer who has managed to claw his way out of Python
> basics and even covered the intermediate parts. But I feel I have a ton of
> theory in my head and would like to see some smallish
On Thursday, September 3, 2015 at 6:55:06 PM UTC+2, Palpandi wrote:
> Hi All,
>
> Is there any module available in python standard library for XML binding? If
> not, any other suggestions.
>
> Which is good for parsing large file?
> 1. XML binding
> 2. Creating our own classes
>
>
> Thanks,
>
Ops! Cut and paste error from an old announcement. Of course now there is a
single documentation both for Python 2 and 3, so the only valid link is
https://github.com/micheles/decorator/blob/4.0.0/documentation.rst
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simpler; moreover all the decorators involved
preserve the signature of the decorated functions.
Enjoy!
Michele Simionato
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Support the Python Software Foundation:
http://www.python.org/psf/donations/
on several Python versions at the same
time:
https://travis-ci.org/micheles/decorator/builds/54584865
Enjoy!
Michele Simionato
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Support the Python Software Foundation:
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Il giorno mercoledì 13 agosto 2014 19:13:16 UTC+2, thequie...@gmail.com ha
scritto:
What is the difference between traits and roles?
People keep using the same names to mean different concepts. For me traits are
the things described here:
Years ago I wrote strait: https://pypi.python.org/pypi/strait
I wonder who is using it and for what purpose, since surprisingly enough it has
50+ downloads per day. For me it was more of an experiment than a real project.
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I have a memory leak in a program using big arrays. With the goal of debugging
it I run into the memory_profiler module. Then I discovered something which is
surprising to me. Please consider the following script:
$ cat memtest.py
import gc
from memory_profiler import profile
@profile
def
On Wednesday, April 3, 2013 3:05:31 AM UTC+2, Rotwang wrote:
After thinking about it for a while I've come up with the following
abomination
Alas, there is actually no good way to implement this feature in pure Python
without abominations. Internally the decorator module does something
ShiningPanda looks really really cool. I need to investigate it.
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is welcome!
Michele Simionato
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I have the following module implementing a registry of functions with a
decorator:
$ cat x.py
registry = {} # global dictionary
def dec(func):
registry[func.__name__] = func
print registry, id(registry)
return func
if __name__ == '__main__':
import xlib
print registry,
On Tuesday, October 9, 2012 5:24:17 PM UTC+2, Peter Otten wrote:
Seriously, you shouldn't use the main script as a library; it is put into
the sys.modules cache under the __main__ key. Subsequent imports under its
real name will not find that name in the cache and import another instance
The standard is to use `cls`. In the __new__ method you can use `mcl` or `meta`.
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Python 3.2 enhanced contextlib.contextmanager so that it is possible to
use a context manager as a decorator. For instance, given the
contextmanager factory below
@contextmanager
def before_after():
print(before)
yield
print(after)
it is possibile to use it to generate decorators:
This may get you started (warning: not really tested).
$ echo instr.py
from warnings import warn
oget = object.__getattribute__
tget = type.__getattribute__
class Instr(object):
class __metaclass__(type):
def __getattribute__(cls, name):
clsname = tget(cls,
plac is based on argparser and it is intended to be much easier to use. See
http://plac.googlecode.com/hg/doc/plac.html
Here is an example of usage.
$ cat vcs.py
class VCS(object):
A fictitious version control tool
commands = ['checkout', 'commit']
def checkout(self, url):
Here is an example by using my own library plac
(http://pypi.python.org/pypi/plac):
class Server():
def configure_logging(self, logging_file):
pass
def check(self):
pass
def deploy(self):
pass
def configure(self):
pass
def __init__(self,
He is basically showing that using mixins for implementing logging is not such
a good idea, i.e. you can get the same effect in a better way by making use of
other Python features. I argued the same thing many times in the past. I even
wrote a module once (strait) to reimplement 99% of multiple
On Friday, May 27, 2011 10:49:52 AM UTC+2, Ben Finney wrote:
The exquisite care that you describe programmers needing to maintain is IMO
just as much a deterrent as the super-is-harmful essay.
Worth quoting. Also I think this article may encourage naive programmers along
the dark path of
The fact that even experienced programmers fail to see that
super(type(self),self) in Python 2 is NOT equivalent to super()
in Python 3 is telling something.
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Looks cool, I will have a look at it, thanks!
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Do you know if there is any converter from the Markdown syntax to the
rst syntax? Googling for markdown2rst
did not help. Thanks!
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Notice that Peter's approach also works without inheritance:
registries = {}
@property
def per_class(self):
cls = type(self)
try:
return registries[cls]
except KeyError:
result = registries[cls] = []
return result
class A(object): per_class=per_class
class B(object):
On Jan 12, 6:09 pm, Alice Bevan–McGregor al...@gothcandy.com wrote:
entirely sure what you mean by 'smart' options. If your'e referring to
using a single hyphen and a list of characters to represent a long
option (which, to the rest of the world, use two leading hyphens) then
that's pretty
On Jan 11, 8:25 am, Alice Bevan–McGregor al...@gothcandy.com wrote:
explicit callbacks or typecasting functions, etc.
I got tired of using PasteScript and OptParse. Mostly OptParse, actually. :/
It's a pity that the argument parsing modules in the standard library
are so verbose that
On Jan 11, 4:06 pm, Alice Bevan–McGregor al...@gothcandy.com wrote:
Plac appears (from the documentation) to be written on top of argparse.
:(
And the problem with that being what?
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On Jan 11, 5:22 pm, Jean-Michel Pichavant jeanmic...@sequans.com
wrote:
Michele Simionato wrote:
On Jan 11, 4:06 pm, Alice Bevan McGregor al...@gothcandy.com wrote:
Plac appears (from the documentation) to be written on top of argparse.
:(
And the problem with that being what
On Jan 11, 4:06 pm, Alice Bevan–McGregor al...@gothcandy.com wrote:
After looking into it, Plac's default help display isn't very helpful;
you need to massage your application a fair amount before generating
nice, complete-looking argument lists and such. For example:
def
On Jan 11, 6:57 pm, Mike ter...@gmail.com wrote:
On Jan 11, 11:26 am, Michele Simionato michele.simion...@gmail.com
wrote:
In that case easy_install/pip/whatever will install the dependency
automatically (who is installing
dependencies by hand nowadays?).
I do. Is this bad? :}
You
Python 3 and function annotations you
may want to try out the new decorator module (easy_install decorator)
and give me feedback.
See http://pypi.python.org/pypi/decorator for more.
Thanks for your time and Happy New Year to all fellows Pythonistas!
Michele Simionato
P.S. today I have
For future googlers: it turns out in my case the call to .starttls()
was not needed: I removed it and everything worked. Dunno why I was
there in the first place, the original code was written by somebody
else.
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in doing so,
but you cannot know for sure unless you try. I don't know if Tkinter
uses features of old-style classes which are inconsistent with new-
style classes, but probably the answer is not much.
Michele Simionato
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here at work
we are going to use Erlang in the near future and I hope to get my
hand dirty and see in practice how well one can work with a language
without inheritance. BTW, is there anybody here with experience on
such languages and caring to share his learned lessons?
Michele
On Nov 29, 7:01 am, Leo Jay python.leo...@gmail.com wrote:
Hi all,
I'd like to know how do you guys find out what's happening in your
code if the process seems not work.
In java, I will use jstack pid to check stacks of threads and lock status.
But I don't know how to do it in python.
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not know of other use cases either.
Michele Simionato
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and
to figure out where the problem is?
TIA,
Michele Simionato
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On Nov 5, 5:55 pm, gb345 gb...@invalid.com wrote:
For a project I'm working on I need a way to retrieve the source
code of dynamically generated Python functions. (These functions
are implemented dynamically in order to simulate partial application
in Python.[1]) The ultimate goal is to
On Nov 4, 2:19 am, braden faulkner brf...@gmail.com wrote:
I'm using a menu for my command line app using this method.
choice = foobar
while choice != q:
if choice == c:
temp = input(Celsius temperature:)
print Fahrenheit:,celsius_to_fahrenheit(temp)
elif choice ==
On Oct 22, 10:42 pm, Felipe Bastos Nunes felipe.bast...@gmail.com
wrote:
Hi! I was looking for a good decorator library to study and make my
own decorators. I've read the Bruce Eckel's blog at artima dot com.
But I need some more examples. I'm building a WSN simulator like SHOX
is in java, but
Accepting both options and positional arguments for the same purpose
does not look like a good idea to me.
Anyway, here is a solution using plac (http://pypi.python.org/pypi/
plac) assuming you can afford an external dependency:
import plac
@plac.annotations(
personname=(person to be
Here is a solution using plac (http://pypi.python.org/pypi/plac) and
not OptionParse, in the case
the Linux underlying command is grep:
import subprocess
import plac
@plac.annotations(help=('show help', 'flag', 'h'))
def main(help):
if help:
script_usage =
or Ruby. C is free from this problem
because it is a very old and stable language. There is no more content
in that post and everybody should already know such basic facts.
Michele Simionato
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On Sep 2, 1:45 pm, Neal Becker ndbeck...@gmail.com wrote:
I'm interested in using argparse to parse a string formatted as:
my_prog --option1=1,10,37
That is, a list of comma delimited values. I guess nargs almost does it,
but expects options to be space-delimited.
What would be the
On Aug 31, 3:45 am, NickC reply...@works.fine.invalid wrote:
I'm struggling to see how you could refactor the option parsing function.
After all, it has to process the options, so it has to do all the setup
for those options, and then process them.
Perhaps plac could simplify your life, by
Perhaps, I should give an example of using plac.
For instance, here is how you could implement a SVN-like
tool with two commands ``checkout`` and ``commit``. The trick is to
write a class with two methods ``checkout`` and ``commit`` and an
attribute ``.commands`` listing them, and to call the
chars and longer code looks
ugly, that I look at two-side diffs all the time, and that sometimes I
want to print on paper the code I have to work with. OTOH, I do not
see a single advantage in using long lines.
Michele Simionato
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On Jul 31, 5:08 am, Steven D'Aprano st...@remove-this-
cybersource.com.au wrote:
I have read Michelle Simionato's articles on super in Python.
One l please! I am a man! ;-)
But Michelle is wrong to conclude that the problem lies with the concept
of *superclass*. The problem lies with the
On Aug 1, 1:08 pm, News123 news1...@free.fr wrote:
I wondered, whether there's a simple/standard way to let
the Optionparser just ignore unknown command line switches.
thanks in advance for any ideas
I will plug in my own work on plac: http://pypi.python.org/pypi/plac
Your problem would be
On Jul 25, 1:11 am, Navkirat Singh navkir...@gmail.com wrote:
OK I wanted zombie processes and have been able to regenerate them with
multiprocessing. Now lets see how I can handle them.
The multiprocessing docs say:
Joining zombie processes
On Unix when a process finishes but has not been
Everything you ever wanted to know about super is collected here:
http://micheles.googlecode.com/hg/artima/python/super.pdf
M.S.
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On Jul 24, 4:42 am, Rolando Espinoza La Fuente dark...@gmail.com
wrote:
Finally everything make sense. And make think about be careful when
doing multiple inheritance.
Any thoughts?
~Rolando
I am not fond of multiple inheritance either and I wrote at length
about the dangers of it. If you
On Jul 20, 11:38 pm, kak...@gmail.com kak...@gmail.com wrote:
Hi to all,
I 'm writing a linux console app with sockets. It's basically a client
app that fires commands in a server.
For example:
$log user 55
$sessions list
$server list etc.
What i want is, after entering some commands, to
is stop thinking like in Java and start using idiomatic
Python. We are here to help.
Michele Simionato
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like such function is wrapped in Python: what are my options?
Notice that compatibility with pyreadline (which work on Windows)
would be a plus.
TIA,
Michele Simionato
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: then thanks to macros you
could write a *compiled* sublanguage. Doing the same in Python is
essentially impossible.
Michele Simionato
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On Jul 7, 10:55 pm, Carl Banks pavlovevide...@gmail.com wrote:
On Jul 7, 1:31 am, Paul McGuire pt...@austin.rr.com wrote:
I just
couldn't get through on the python-dev list that I couldn't just
upgrade my code to 2.6 and then use 2to3 to keep in step across the
2-3 chasm, as this would
On Jun 30, 2:52 pm, Lie Ryan lie.1...@gmail.com wrote:
On 06/27/10 11:24, Steven D'Aprano wrote:
Producing print function takes a little bit more effort than producing a
print statement.
(1) The main use-cases for print are quick (and usually dirty) scripts,
interactive use, and as a
On Jun 28, 3:30 pm, dirknbr dirk...@gmail.com wrote:
I get an int object is not callable TypeError when I execute this. But
I don't understand why.
parser = optparse.OptionParser(usage: %lines [options] arg1)
parser.add_option(-l, --lines, dest=lines,
On Jun 28, 9:56 pm, Ben Finney ben+pyt...@benfinney.id.au wrote:
Michele Simionato michele.simion...@gmail.com writes:
optparse is so old-fashioned. Use plac!
The OP should be made aware that:
* plac is a third-party library with (TTBOMK) no prospect of inclusion
in the standard library
On Jun 28, 11:47 pm, rantingrick rantingr...@gmail.com wrote:
Give your *script* an
enema, and do *yourself* a favor by harnessing the simplistic elegance
of the optphart module instead!
#-- Start Script --#
def optphart(args):
d = {'args':[]}
for arg in args:
if
to
Python 3.1, but the new features require Python 2.5.
You can download it from PyPI ($ easy_install -U plac):
http://pypi.python.org/pypi/plac
Enjoy!
Michele Simionato
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On Jun 20, 12:02 pm, Andre Alexander Bell p...@andre-bell.de wrote:
How about adding some support for internationalization of the generated
usage output?
The usage message of plac is actually generated by the underlying
argparse library. argparse use gettext internally, so I would say the
On Jun 20, 8:26 pm, Andre Alexander Bell p...@andre-bell.de wrote:
On 06/20/2010 11:22 AM, Michele Simionato wrote:
A few weeks ago I presented on this list my most recent effort, plac.
http://micheles.googlecode.com/hg/plac/doc/plac_ext.html
But this one is broken. :(
Aagh! The good one
On Jun 16, 7:25 am, John Nagle na...@animats.com wrote:
OK, working on this. I can make a module make itself into a
fake class, but can't yet do it to other modules from outside.
John Nagle
I think you can with something like
import module
On Jun 16, 4:43 am, John Nagle na...@animats.com wrote:
Is it possible to override __setattr__ of a module? I
want to capture changes to global variables for debug purposes.
None of the following seem to have any effect.
modu.__setattr__ = myfn
setattr(modu,
On Jun 8, 10:38 am, hiral hiralsmaill...@gmail.com wrote:
Hi,
I am using optparser to do following...
Command syntax:
myscript -o[exension] other_arguments
where; extension can be 'exe', 'txt', 'pdf', 'ppt' etc.
Now to parse this, I am doing following...
parser.add_option(-oexe',
On Jun 3, 12:28 pm, Martin P. Hellwig martin.hell...@dcuktec.org
wrote:
On the other hand it might not be so bad that you don't get questions
from users here who are unable to use a nntp reader or news to mail service.
I am unable to use a nntp reader or news to mail service. I use the
Google
On Jun 2, 6:37 am, Michele Simionato michele.simion...@gmail.com
wrote:
I would like to announce to the world the first public release of
plac:
http://pypi.python.org/pypi/plac
The second release is out. I have added the recognition of keyword
arguments, improved the formatting of the help
On Jun 2, 10:43 am, Paul Rubin no.em...@nospam.invalid wrote:
Tim Golden m...@timgolden.me.uk writes:
pattern, which provides a minimally semi-self-documenting
approach for positional args, but I've always found the existing
offerings just a little too much work to bother with.
I'll give
On Jun 2, 11:01 am, Stefan Behnel stefan...@behnel.de wrote:
I managed to talk a Java-drilled collegue of mine into
writing a Python script for a little command line utility, but he needed a
way to organise his argument extraction code when the number of arguments
started to grow beyond two. I
On Jun 2, 2:20 pm, Ulrich Eckhardt eckha...@satorlaser.com wrote:
Hi!
When I use help() on a function, it displays the arguments of the function,
along with the docstring. However, when wrapping the function using
functools.wraps it only displays the arguments that the (internal) wrapper
On Jun 2, 6:37 am, Michele Simionato michele.simion...@gmail.com
wrote:
With blatant immodesty, plac claims to be the easiest to use command
line arguments parser module in the Python world
It seems I have to take that claim back. A few hours after the
announce I was pointed out to http
[-h] arg
example.py: error: unrecognized arguments: arg2
You can find in the documentation a lot of other simple and not so
simple
examples:
http://micheles.googlecode.com/hg/plac/doc/plac.html
Enjoy!
Michele Simionato
P.S. answering an unspoken question: yes, we really needed yet
On May 25, 9:08 am, Peter Otten __pete...@web.de wrote:
But the list comprehension is already non-equivalent to the for loop as the
loop variable isn't leaked anymore. We do have three similar constructs with
subtle differences.
I think not turning the list-comp into syntactic sugar for
On May 25, 10:42 am, kak...@gmail.com kak...@gmail.com wrote:
Hi to all,
i'm creating a command line application using asyncore and cmd. At
if __name__ == '__main__':
import socket
args = sys.argv[1:]
if not args:
print Usage: %s querystring % sys.argv[0]
On May 25, 12:03 pm, Giampaolo Rodolà g.rod...@gmail.com wrote:
Too bad cmdloop() doesn't provide an argument to return immediately.
Why don't you submit this patch on the bug tracker?
--- Giampaolohttp://code.google.com/p/pyftpdlibhttp://code.google.com/p/psutil
Because it is not a bug, cmd
On May 25, 2:56 pm, kak...@gmail.com kak...@gmail.com wrote:
Could you please provide me with a simple example how to do this with
threads.
I don't know where to put the cmdloop().
Please help, i' m so confused!
Thank you
What are you trying to do? Do you really need to use the standard
On May 25, 12:47 am, Carl Banks pavlovevide...@gmail.com wrote:
The situation here is known. It can't be corrected, even in Python 3,
without modifying iterator protocol to tie StopIteration to a specific
iterator. This is possible and might be worth it to avoid hard-to-
diagnose bugs but it
On May 22, 10:49 am, Michele Simionato michele.simion...@gmail.com
wrote:
I have finally decided to port the decorator module to Python 3.
Changing the module was zero effort (2to3 worked) but changing the
documentation was quite an effort, since I had to wait for docutils/
pygements
from the building process, if any. I am not
sure of what will happen if you do not have distribute or if you have
a previous version of the module, or if you use pip or something else
(even in Python 2.X). The packaging in Python has become a real mess!
TIA for you help,
Michele Simionato
things which are quite different from Python e.g.
the attitude towards exceptions. In theory Go should be akin to C,
but my gut feeling is that in practice programming in it should not
feel too much different from
programming in Python (but I do not have first hand experience).
Michele Simionato
On May 10, 8:18 pm, a...@pythoncraft.com (Aahz) wrote:
saying that functional features
are tacked on understates the case. Consider how frequently people
reach for list comps and gen exps. Function dispatch through dicts is
the standard replacement for a switch statement. Lambda callbacks
Or you copy the whole dictionary or you just copy the keys:
for k in d.keys():
...
or
for k in list(d):
...
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On May 5, 8:00 am, James Mills prolo...@shortcircuit.net.au wrote:
On Wed, May 5, 2010 at 3:35 PM, Michele Simionato
michele.simion...@gmail.com wrote:
I am sure it has, but I was talking about just putting in the
repository an index.html file and have it published, the wayI hear
: it is not that annoying, but perhaps
there is already some services out there publishing Sphinx pages
directly. Do you know of any? Currently I am hosting my stuff on
Google Code but I do not see an easy way to publish the documentation
there. Any hint is appreciated.
Michele Simionato
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On May 4, 8:07 am, Martin v. Loewis mar...@v.loewis.de wrote:
If it's a Python package that this documentation is about, you can host
it on PyPI.
It must not be Python, but let's consider this case first. How does it
work? When I published
my decorator module
On May 4, 8:37 am, Martin v. Loewis mar...@v.loewis.de wrote:
Do you know of recent improvements on the PyPI side about docs
hosting?
Yes; go to your package's pkg_edit page, i.e.
http://pypi.python.org/pypi?%3Aaction=pkg_editname=decorator
and provide a zip file at Upload Documentation.
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